Features
Roquefort Cheese
Spontaneous Ignition in Woolen Mills
Mack's Improved Feed-Water Heater
Siemens on Patents
The August Meteors
From the Spectator
The Manufacture of Sulphuric Acid
Determination of the Amount of Expansion of Mineral Oils
The Drive Well
Demuth's Improvement in Glass Window Lights
Andrews' Patent Saw Hangings and Saws
The Hydrostatic Paradox
The Wandering of Phosphorus in Plants
The Exhibition of the American Institute
Annual Report of the President of the Western Union Telegraph Company
Return of C. F. Hall, The Arctic Explorer
The Natural Advantages of Tennessee for the Production of Iron
Applications for Extension of Patents
The Torpedo Patent Case
How to File and Set a Saw
Recent American and Foreign Patents
Official List of Patents
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Correspondence
Business and Personal
